Use long for downloads count in OpenSearch index.

[simi]

fixes failing indexing of bundler

Searchkick::ImportError: {"type"=>"mapper_parsing_exception", "reason"=>"failed to parse field [downloads] of type [integer] in document with id 'xyz'. Preview of field's value: '2300514366'", "caused_by"=>{"type"=>"input_coercion_exception", "reason"=>"Numeric value (2300514366) out of range of int (-2147483648 - 2147483647)\n at [Source: REDACTED (`StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION` disabled); line: 1, column: 41]"}} on item with id 'xyz'

Don't merge. Index needs to be migrated and rebuilt first.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.02%. Comparing base (2ffe934) to head (247f878).
Report is 26 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5052   +/-   ##
=======================================
  Coverage   97.02%   97.02%           
=======================================
  Files         421      421           
  Lines        8754     8754           
=======================================
  Hits         8494     8494           
  Misses        260      260           

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